JavaScript Skills Assessment

What is the correct way to declare a variable in JavaScript?

• int variableName;

• declare variableName;

• variableName = 5;

• let variableName; or const variableName; or var variableName;

Which of the following is a primitive data type in JavaScript?

• number

• boolean

• object

• string

What will the following code output: console.log(5 > 3 && 2 < 4);?

• null

• true

• false

• undefined

How do you define a function in JavaScript?

• myFunction(param1, param2) { // function body }

• function:myFunction(param1, param2) { // function body }

• define myFunction(param1, param2) => { // function body }

• function myFunction(param1, param2) { // function body }

What is the scope of a variable declared with 'let' inside a block?

• The scope of a variable declared with 'let' is global.

• The scope of a variable declared with 'let' is limited to the entire script.

• The scope of a variable declared with 'let' inside a block is limited to that block.

• The scope of a variable declared with 'let' is limited to the entire function.

How can you access the second element of an array named 'fruits'?

• fruits[1]

• fruits(1)

• fruits[2]

• fruits.get(1)

What is the output of the following code: var obj = {name: 'John', age: 30}; console.log(obj['name']);?

• John

• Jane

• 30

• Doe

How do you add an event listener to a button with the id 'myButton'?

• document.getElementById('myButton').onClick(function() { /* your code here */ });

• document.querySelector('#myButton').addEventListener('hover', function() { /* your code here */ });

• document.getElementById('myButton').addEventListener('click', function() { /* your code here */ });

• $('#myButton').click(function() { /* your code here */ });

What method would you use to change the text content of an HTML element with the id 'myElement'?

• document.querySelector('#myElement').setText('new text');

• document.getElementById('myElement').textContent = 'new text';

• document.getElementById('myElement').innerHTML = 'new text';

• myElement.textContent = 'new text';

How do you create a new object in JavaScript using object literal notation?

• const obj = {key1: 'value1'; key2: 'value2'};

• const obj = new Object();

• const obj = { key1: 'value1', key2: 'value2' };

• const obj = ['value1', 'value2'];